Decalcomania transfer paper



July 3, 1934- F. w. HUMPHNER 1,965,289

DECALCOMANIA TRANSFER PAPER Filed April 24, '1933 iesa'ye l I l j?? We??2577",

Patented July 3, 1934 PATENT OFFICE DECALCOMANIA TRANSFER PAPERFerdinand W. Humphner, Oak Park, Ill., assignor to Mid-States GummedPaper Co., Chicago, Ill., a corporation of Illinois Application Aprilg4, 1933, Serial No. 667,737

2 Claims.

This invention relates to decalcomania transfer paper and moreparticularly to a type of decalcomania transfer in which the transfer,after the paper base is moistened, is slipped olf the pa- 5 per and thebottom side of the transfer applied to the new surface.

An object of the invention is to provide a permanently flat ornon-curling transfer paper upon which the final prints may be formed.Other specific objects and advantages will appear as the specificationproceeds.

The invention is illustrated, in its preferred embodiment, by theaccompanying drawing, in Which- Figure 1 is a perspective View of atransfer paper embodying my invention, the lacquer and adhesive layersbeing partially rolled; and Fig. 2, a plan view of the transfer paper, aportion of the lacquer and adhesive layers being torn away. The paperemployed may be of any suitable type, a slack sized paper beingpreferred. To the top side of the paper, I apply a single coating of gumor adhesive, consisting mainly of a blend of animal and vegetable glues.For example, a mixture consisting of 25% of animal glue and '75% ofdextrine, may be mixed with equal parts of water and to this may beadded 1% of glycerine and 2% of glucose. While this composition has beenfound satisfactory, it is recognized that the proportions and theconstituents may be varied according to the type of adhesive desired.The above mass is mixed thoroughly and then applied to the paper in onecoating. The thickness of the mixture is preferably such as to permitthe adhesive to flow to a flat level surface without mechanical aid.However, if desired, mechanical means may be employed to form theadhesive layer on the paper.

After the adhesive is dry, I prefer to process the paper in a suitablenon-curling machine or other apparatus in order to break up the gumlayer into a multitude of segments substantially uniformly distributedthrough the adhesive layer. In view of the fact that the construction ofnoncurnng machines is wen known, a detailed description of the mechanismis unnecessary. Ordinarily, the paper is drawn over a breaker barpositioned at an angle of 45 with respect to the paper and then reversedover a second bar at 45 ing. In fact, it is only necessary to break orcrack the surface of the adhesive and the paper may, if desired, bepassed over one edge at right angles to the grain if the paper, causingthe adhesive to form a diamond effect on the adhesive coatlayer to crackand provide a substantially unform degree of cracking throughout thelayer.

After the adhesive surface has been broken up with intersecting cracksthroughout the layer,

I next cover the adhesive with a layer of lacquer, 3o theA constitutionof the lacquer being. such as to enable it to penetrate the intersticesand fill up the voids of the cracks. Also, I prefer to employ a lacquerwhich is sufiiciently tenacious or tough to prevent the cracks fromagain closing under the various conditions to which the paper may besubjected. There is atendency for gummed paper, which has been processedin a non-curling machine, to acquire under certain conditions ofhumidity or temperature, etc., a tendency to again roll or curl. With mytransfer paper, the lacquer layer forms a wedge between each of theminute cracks and renders the paper permanently noncurling.

The lacquer layer has an affinity for ink so that upon the top of thelayer, prints of various forms may be made. For example, printing fortax stamps, etc. may be formed on the top of the lacquer layer.

A lacquer of any suitable composition having the desired qualities ofsufficient uidity to penetrate the interstices, suii'icient bodyortoughness, affinity for inks, etc. may be employed. Lacquers havingthese qualities are well known and a detailed description isunnecessary. Cellulose 85 lacquers having gum constituents and suitablesolvents have been satisfactorily employed. By way of example, thefollowing constituents and proportions of a satisfactory lacquer may bestated:

Parts Nitrocellulose 12 Dibutyl phthalate 'I Resin (dammer gum) 6 Ethylacetate 10 95 Butyl acetate 20 Ethyl alcohol 10 Toluol 35 ylacquer layerto the paper now serves as means for bonding the transfer to the newsurface.V The transfer sticks tenaciously to cellophane and the like.

En the description above given, the lacquer covers the sheet or strip ofpaper and the individual or separate prints are formed on the sheet. Iidesired, the sheet may,r be perforated between the prints so that theseparate transfers may be torn apart With their respective paper basesattached thereto.

While I have described adhesive layers and lacquer layers of certainspecic compositions, it Will be understood that any suitable adhesive orlacquer for the purposes described may be employed. Also, in theprocessing of the paper, any suitable means for cracking .the paper soas to distribute the cracks rather uniformly over the adhesive surfacemay be used. The foreclearness of understanding only, and no unnecessarylimitations should be understood there from, but the appended claimsshoiiid he con* strued as broadly as permissible, in View the prior art.

Iclaim:

l. A decalcomania transfer comprising a paper base, a dry adhesive layerthereon, said adhesive layer having cracks therein and substantiallyuniformly distributed therethrough, tough lacquer body over said.adhesive and extending between said cracks, and a final print on the topof said lacquer.

2. A deoalcomania transfer comprising a paper base, a dry adhesive layerhaving cracks "tiaein and substantially uniformly distributedtherethrough, lacquer extending over said layer of adhesive and betweensaid cracks and having sufficient body 'to prevent the closing of saidcracks, and a finali print on the top of said layer.

EERDENANF W.

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